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Finding the Fourth Proportional to 289,363.40, 433,980.30 and 190,219.40

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Solution

The fourth proportional to 289,363.40, 433,980.30 and 190,219.40 is: 285,286.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,363.40 : 433,980.30 = 190,219.40 : x
  2. Step 2: Convert to fraction form
    289,363.40/433,980.30 = 190,219.40/x
  3. Step 3: Cross multiply
    289,363.40x = 433,980.30 × 190,219.40
  4. Step 4: Simplify right side
    289,363.40x = 82,551,472,277.82
  5. Step 5: Solve for x
    x = 82,551,472,277.82/289,363.40
  6. Step 6: Final answer
    x = 285,286.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.